<span>According to octet rule, atoms with an atomic number less than 20 tend to combine with other atom such that both of these atoms have eight electrons in their valence shells, which gives them the same electronic configuration as that of noble gas.
However, there are few compound that donot obey octel rule. Among the elements mentioned above i.e. oxygen and helium obeys octet rule.
In case of nitrogen, oxide of nitrogen (like NO and NO2) have incomplete octet.
While there are few compounds of Br wherein Br has expanded octet. For example, in BrF5, Br has 12 electrons in valence shell. </span>
To convert from atoms of argon to moles of argon, you need to divide by Avogadro's constant.
3.01*10^23 atoms *(1 mole/6.022*10^23 atoms) = 0.500 moles Ar
0.500 moles of Argon is equal to 3.01*10^23 atoms of Argon.
Answer:
a
Explanation:
Am not sure of the answer
Answer: it is A .
hope this helps!!!!
Explanation:Be is not multivalent